The Geophysics That Time Forgot

Yesterday was my birthday, and tomorrow is my talk at the Big House.  I'm getting my talk all together, and I have to decide if I want to use plastic or steel slinkies.  So, going through my Elderly bags of tricks, I come across this magnetic map.  At the Elderly company, we paid for a high resolution airplane magnetic survey.  The resolution was so good you could pick out hydro-pole transformers, and Elderly ship wrecks.  Here it is.It's lovely!  Here you can totally pick out the boundary zone that defines the Hamilton fault.  Naturally, this sort of thing doesn't exist for the Big Company, what with their great need for Precambrian simplification.  :)

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